nginx+unicorn

nginx

server {
    listen   80;
    server_name  _;

    access_log  /var/log/nginx/access.log;
    root   /var/www/default/public;

    location / {
        try_files  $uri/index.html @unicorn;
    }

    location @unicorn {
        proxy_pass http://unicorn;
    }
}

upstream unicorn {
    server unix:/tmp/unicorn.socket;
}